On my MP3 the larger fuel injectors were touching the intake manifold when you tightened down the fuel rail. I was just thinking out loud if I should make a little bit of extra clearance on the manifold for them.
What "larger injectors" you've got ?? 550 maybe ?
Either way i'm looking for 440 which might not rise too much issue.
A lot of ppl run 440 as well.
Have you test fitted the prototype yet ?? Niceeeeeeee